Emergency Fund Calculator

Our emergency fund calculator works out the right size for your financial safety net. Financial advisers recommend 3-6 months of essential expenses in a separate easy-access savings account.

How to Use the Emergency Fund Calculator

Enter your total monthly essential expenses — the outgoings that continue regardless of your income: rent or mortgage, utility bills, food, insurance, minimum debt payments. Do not include discretionary spending such as eating out or entertainment — the emergency fund covers essentials only, because in a genuine emergency (job loss, serious illness, major repair), you will reduce discretionary spending immediately.

Select your target fund size in months of expenses. Financial guidance typically recommends three months of expenses as a minimum and six months as a comfortable buffer. The right amount for you depends on your employment security, whether you have dependants, whether you have other liquid assets, and whether your income is stable or variable. Freelancers, commission-only workers, and those in volatile industries should lean toward six months or more.

Enter your monthly saving rate — the amount you can realistically put aside each month specifically for this fund. The calculator shows how long it will take to reach your target. If the timeline looks too long, consider whether a windfall (bonus, tax refund, inheritance) could accelerate the initial build, while ongoing contributions maintain the balance thereafter.

Keep your emergency fund in an easy-access account, not investments. The purpose is liquidity — you need to be able to access the money within days without penalty or market timing risk. A competitive easy-access savings account or Cash ISA is appropriate. Do not be tempted to invest the emergency fund for higher returns — the cost of having to sell investments at a low point in a market downturn could far exceed the interest forgone on a cash savings account.